I'm surprised this hasn't been talked about, since it seems like such a basic part of training! One of our most basic exercises is exhale/roll back....inhale/roll up.
Anytime you roll, fall, settle you should be exhaling fully. Anytime you attack, you should be exhaling. The pace of the exhale should be the pace of the movement.
To me its not "control"; it's letting my natural breath create the rhythm of my movement.